Most drivers know that underinflated tires are a safety hazard. But many don’t recognize the dashboard warning light that signals a problem with a tire. A national survey by Schrader International, considered the inventor of the pneumatic tire valve used on cars today, found that 42% of drivers can’t accurately identify the tire pressure monitoring system (TPMS) dashboard warning symbol. The symbol, a yellow or red outline of a tire surrounding an exclamation point, alerts drivers to flats or a loss of pressure in one or more tires. It has been standard on vehicles sold in the U.S. since the 2008 model year. Schrader estimates that more than 104-million vehicles in the U.S....

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